What Is poi-5.2.3.jar?

poi-5.2.3.jar is one of the JAR files for Apache POI 5.2.3, which provides an API for Microsoft document files of Word, Excel, PowerPoint, and Visio.

poi-5.2.3.jar supports Apache POI components that read and write Microsoft's OLE 2 Compound document format, which is used in early versions of Microsoft Office tools like Word 97, Excel 97, PowerPoint 97, etc.

poi-5.2.3.jar is distributed as part of the poi-bin-5.2.3-20220909.zip download file.

JAR File Size and Download Location:

JAR name: poi-5.2.3.jar
Target JDK version: 9

File name: poi.jar, poi-5.2.3.jar
File size: 2964641 bytes
Release date: 09-09-2022
Download: Apache POI Website

Here are Java Source Code files for poi-5.2.3.jar:

⏎ org/apache/poi/poifs/crypt/standard/StandardEncryptionHeader.java

/* ====================================================================
   Licensed to the Apache Software Foundation (ASF) under one or more
   contributor license agreements.  See the NOTICE file distributed with
   this work for additional information regarding copyright ownership.
   The ASF licenses this file to You under the Apache License, Version 2.0
   (the "License"); you may not use this file except in compliance with
   the License.  You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
==================================================================== */
package org.apache.poi.poifs.crypt.standard;

import static org.apache.poi.poifs.crypt.EncryptionInfo.flagAES;
import static org.apache.poi.poifs.crypt.EncryptionInfo.flagCryptoAPI;

import java.io.IOException;
import java.io.InputStream;

import org.apache.poi.hssf.record.RecordInputStream;
import org.apache.poi.poifs.crypt.ChainingMode;
import org.apache.poi.poifs.crypt.CipherAlgorithm;
import org.apache.poi.poifs.crypt.CipherProvider;
import org.apache.poi.poifs.crypt.EncryptionHeader;
import org.apache.poi.poifs.crypt.HashAlgorithm;
import org.apache.poi.util.LittleEndianByteArrayOutputStream;
import org.apache.poi.util.LittleEndianConsts;
import org.apache.poi.util.LittleEndianInput;
import org.apache.poi.util.LittleEndianOutput;
import org.apache.poi.util.StringUtil;

public class StandardEncryptionHeader extends EncryptionHeader implements EncryptionRecord {

    protected StandardEncryptionHeader(StandardEncryptionHeader other) {
        super(other);
    }

    protected StandardEncryptionHeader(LittleEndianInput is) throws IOException {
        setFlags(is.readInt());
        setSizeExtra(is.readInt());
        setCipherAlgorithm(CipherAlgorithm.fromEcmaId(is.readInt()));
        setHashAlgorithm(HashAlgorithm.fromEcmaId(is.readInt()));
        int keySize = is.readInt();
        if (keySize == 0) {
            // for the sake of inheritance of the cryptoAPI classes
            // see 2.3.5.1 RC4 CryptoAPI Encryption Header
            // If set to 0x00000000, it MUST be interpreted as 0x00000028 bits.
            keySize = 0x28;
        }
        setKeySize(keySize);
        setBlockSize(getKeySize());
        setCipherProvider(CipherProvider.fromEcmaId(is.readInt()));

        is.readLong(); // skip reserved

        // CSPName may not always be specified
        // In some cases, the salt value of the EncryptionVerifier is the next chunk of data
        if (is instanceof RecordInputStream) {
            ((RecordInputStream)is).mark(LittleEndianConsts.INT_SIZE+1);
        } else {
            ((InputStream)is).mark(LittleEndianConsts.INT_SIZE+1);
        }
        int checkForSalt = is.readInt();
        if (is instanceof RecordInputStream) {
            ((RecordInputStream)is).reset();
        } else {
            ((InputStream)is).reset();
        }

        if (checkForSalt == 16) {
            setCspName("");
        } else {
            StringBuilder builder = new StringBuilder();
            while (true) {
                char c = (char) is.readShort();
                if (c == 0) {
                    break;
                }
                builder.append(c);
            }
            setCspName(builder.toString());
        }

        setChainingMode(ChainingMode.ecb);
        setKeySalt(null);
    }

    protected StandardEncryptionHeader(CipherAlgorithm cipherAlgorithm, HashAlgorithm hashAlgorithm, int keyBits, int blockSize, ChainingMode chainingMode) {
        setCipherAlgorithm(cipherAlgorithm);
        setHashAlgorithm(hashAlgorithm);
        setKeySize(keyBits);
        setBlockSize(blockSize);
        setCipherProvider(cipherAlgorithm.provider);
        setFlags(flagCryptoAPI.setBoolean(0, true)
                | flagAES.setBoolean(0, cipherAlgorithm.provider == CipherProvider.aes));
        // see http://msdn.microsoft.com/en-us/library/windows/desktop/bb931357(v=vs.85).aspx for a full list
        // setCspName("Microsoft Enhanced RSA and AES Cryptographic Provider");
    }

    /**
     * serializes the header
     */
    @Override
    public void write(LittleEndianByteArrayOutputStream bos) {
        int startIdx = bos.getWriteIndex();
        LittleEndianOutput sizeOutput = bos.createDelayedOutput(LittleEndianConsts.INT_SIZE);
        bos.writeInt(getFlags());
        bos.writeInt(0); // size extra
        bos.writeInt(getCipherAlgorithm().ecmaId);
        bos.writeInt(getHashAlgorithm().ecmaId);
        bos.writeInt(getKeySize());
        bos.writeInt(getCipherProvider().ecmaId);
        bos.writeInt(0); // reserved1
        bos.writeInt(0); // reserved2
        String cspName = getCspName();
        if (cspName == null) {
            cspName = getCipherProvider().cipherProviderName;
        }
        bos.write(StringUtil.getToUnicodeLE(cspName));
        bos.writeShort(0);
        int headerSize = bos.getWriteIndex()-startIdx-LittleEndianConsts.INT_SIZE;
        sizeOutput.writeInt(headerSize);
    }

    @Override
    public StandardEncryptionHeader copy() {
        return new StandardEncryptionHeader(this);
    }
}

⏎ org/apache/poi/poifs/crypt/standard/StandardEncryptionHeader.java

Or download all of them as a single archive file:

File name: poi-5.2.3-src.zip
File size: 2479830 bytes
Release date: 2022-09-09
Download 

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